Watson described the purpose of psychology as: âTo predict, given the stimulus, what reaction will take place; or, given the reaction, state what the situation or stimulus is that has caused the reactionâ (1930, p. 11). * All behavior is learnt from the environment.
Additional tests including penetration,solubility, and ductility are made on the residue. Cutback asphalt grades and tests There are several grades for each of the three types ofcutbacks â rapid curing (RC), medium curing (MC), andslow curing, (SC). The grades include 70, 250, 800, and3000.
Bitumens and bitumen emissionscutbacksâ [class 3 bitumen], solid petroleum asphalt materials cut back to 64% solid with mineral spirits): 89% asphalt A, 1% xylene, and 10% mineral spirits; 98% asphalt B and 2% xylene; 97% asphalt C and 3% xylene; and 97% asphalt D and 3% xylene.